Described are micromachined ultrasonic transducers (MUTs) with convex or concave electrodes, which have enhanced pressure amplitude and frequency response behavior when driven at fundamental and harmonic frequencies, as well as methods of making the same.

A method for producing a plurality of piezoelectric ultrasound transducer elements, the method comprising providing or depositing a piezoelectric material on at least part of a surface of a sheet of substrate to form a layered member; and forming the one or more piezoelectric ultrasound transducer elements from the layered member.

An imaging system includes: a transceiver cell for generating a pressure wave and converting an external pressure wave into an electrical signal; and a control unit for controlling an operation of the transceiver cell. The transceiver cell includes: a substrate; at least one membrane suspending from the substrate; and a plurality of transducer elements mounted on the at least one membrane. Each of the plurality of transducer elements has a bottom electrode, a piezoelectric layer on bottom electrode, and at least one top electrode on the piezoelectric layer. Each of the plurality of transducer element generates a bending moment in response to applying an electrical potential across the bottom electrode and the at least one top electrode and develops an electrical charge in response to a bending moment due to the external pressure wave.

Described are micromachined ultrasonic transducers (MUTs) with convex or concave electrodes, which have enhanced pressure amplitude and frequency response behavior when driven at fundamental and harmonic frequencies, as well as methods of making the same.

Provided are an ultrasound probe including high-sensitive piezoelectric elements and a method of manufacturing an ultrasound probe. The ultrasound probe includes a plurality of piezoelectric elements on a backing material arranged in an array along an arrangement direction. Each of the plurality of piezoelectric elements includes a laminate in which a first conductive part, a piezoelectric body part, and a second conductive part are laminated on a surface of the backing material in order. A plurality of acoustic matching part respectively arranged on the second conductive parts of the plurality of piezoelectric elements is provided. A plurality of third conductive parts acquired by respectively joining a part of the plurality of acoustic matching parts in an elevation direction to the second conductive parts of the plurality of piezoelectric elements is provided. A fourth conductive part that electrically connects the plurality of third conductive parts to each other is provided. The second conductive parts of the plurality of piezoelectric elements, the plurality of third conductive parts, and the fourth conductive part form a common electrode common to the plurality of piezoelectric elements.

Disclosed is a display device. The display device comprising a substrate, a display area including a fingerprint recognition area and a plurality of pixels on the substrate, a support substrate under a rear side of the substrate, a fingerprint sensor, corresponding to the fingerprint recognition area, under the support substrate, and an EMI (electro-magnetic interference) shield member positioned between the support substrate and the fingerprint sensor.

Disclosed is a display. The display device, comprising an electroluminescence display panel including a display area configured to output sound and configured to recognized a fingerprint, an ultrasonic fingerprint sensor disposed at a first area of the electroluminescence display panel and a film-type speaker disposed at a second area of the electroluminescence display panel.

Disclosed is a display device. The display device comprising a substrate, a display area including a fingerprint recognition area on the substrate, a support substrate configured to support the substrate, a fingerprint sensor positioned under a rear side of the support substrate and configured to output ultrasonic to the fingerprint recognition area, and an EMI (electromagnetic interference) shield member positioned between the support substrate and the fingerprint sensor.

Disclosed is a display device. The display device comprising a display area including a fingerprint recognition area and a plurality of pixels disposed on a substrate, an ultrasonic fingerprint sensor, corresponding to the fingerprint recognition area, disposed under the substrate, and a pressure sensor disposed under a rear side of the ultrasonic fingerprint sensor.

Disclosed is a display device. The display device comprises an electroluminescence display panel including a fingerprint recognition area in a display area including a plurality of pixels on a substrate, an ultrasonic fingerprint sensor, under a rear side of the electroluminescence display panel, arranged corresponding to the fingerprint recognition area, and a support substrate, between the electroluminescence display panel and the ultrasonic fingerprint sensor, configured to support the electroluminescence display panel and the ultrasonic fingerprint sensor.